Street-sweeping machine.



' PATENTEI) JUNE 18, 1907.

G. PUM. STREET SWEEPING MACHINE.

APPLIOATION FILED 00119 1905 2 SHBETS-SHEET No. 85'7,415. PATENTED JUNE 18, 1907.

I a. PUM. STREET SWBEPING MACHINE.

APPLIOATION FILED 0013.19, 1905,

2 SHEETS-SHEET 2.

W 1. a 1 3 1 L w ,6 6 9 a .GEonc PUM, OF VIENNA. eam/anemia;

S'TREETP-SWIEIEPING MACHlN E Iva-857,415.

Specification of Letters Patent.

Application-filed October 19, 1905. Serial remain.

.To all whom it may concern:

Be it known that I, GEORG PUM, of city of Vienna, Province of Lower Austria, and Empire of Austria-Hungary, merchant,

having invented certain new and useful Im' rovcments in Street-Sweeping Machines, .do ereby declare that the following'is a full,

clear, and exact description of the same.

Theinvention relates to an lmprovement in street sweeping machines of that class wherein a revolving brush is emplo ed to sweep the dust'particles into a suitab e-dust' receptacle, the brush being geared to and rotated by one axle of a supporting vehicle.

The object of the present invention is the provision of a street sweeper wherebythe sweepings of the road-bedmay be delivered to a swee ing or dust receptacle and whereby the usua clouds of dust accompanying the sweep ng operation may be entirely avoided and the'cost and extra labor attending the preliminary. sprinkling operation likewise dis ensed-with.

0 this end the invention consists in the provision of a casm adapted to completely surround the brush rom the level of t ing a dust receptacle adjacent to and orming one of the 'walls of'sald'casing and so arranged with respect to the brush that the sweepings are carried by the brush upwardly upon the wall of the casing or receptacle to a redetermine'd point whereupon it isdelivered through an aperture or openin into the rece tacle, the latter being provide with a suitable air discharge and also with means preventin the lighter dust particles from be m carried off by the discharging air Ihe invention further contemplates "imroved means whereby the brush may be adjusted relatively to the road-bed.

The invention will be described in connec' tion with the accompanying drawings and will be more'particularl-y set forth and ascertained in and by the appended claims.

- In the drawings :-Figure 1 is a sectional elevation on line .AB of Fig. 2, showing a street sweeper embodying the main features of my invention. Fig. 2 is a plan view thereofwith arts in section. Fig. 3 is a detail sectiona view on line .33 of Fig. 1. Fig. 4 is a detail sectional view on line -l4 of Fig. 1. Fig. 5 is a fragmentary end elevation of one of the brush supports showing the adjustable mounting therefor. Fig. 6 is a section on line 66-of Fig. 5.

the i being trained about e surface swept upwardly, and in further rovidaxle the arms 30 will freely Patented June 18, 1907.

Referring to. the specific construction shown, the frame of the vehicle, designated.

by A is supported in the usual manner upon front and rear wheels, the axle 1 of the rear wheels being utilized as a driver for the sweeping mechanism} First describing the construction ofthe sweeping mechanism and the manner in which the same is .-mounted there is shown a supporting frame 29, pivotally secured, at its rear end, tothe axle 1 and adjustably secured at its forward end in a manner to permit a vertical adjustment about the rear axle 1 as a center. ,The adjusting means at the forward" end as shown comprises chains 31 secured at their lower ends to .arms. 30 rigidly anchored upon the frame 29', said chains at their opposite ends wheels 32, mounted upon a shaft 32. Saidshaftis mounted in bearings formed in standards a rising from the frame A, said shaft carrying aworm I wheel operated by a worm 33 The shaft of the Worm 33 is rotatably su' ported in bearing1 a and may be operate by a crank or ot er suitable means. In order to guide the frame 29 during vertical adjustment and to prevent the same from swaying laterally after adjustment, I provide curved guides 34. The guides 34 are preferably made of chain nel iron and the arms 30 project between the lateral flanges of said guides 34 as clearly shown in Fig. 3. The said guides are rigidly secured upon the frame A of the carriage in such a manner that the center of their curvature coincides with the axis of the axle 1 sothat as the frame 29 is adjut'sed about the move adjacent the guides without binding thereon. In order to limit the downward adjustment of frame 29 and in order to assist in supportin said frame in its lowermost adjustment provide supporting arms 35 which are and which project'forwardly from beneath the frame 29, said arms 35 at their outer ends are connected by chains 37 with the threaded supporting rods 36, the latter having threaded engagement with lugs 36 secured to the guides 34. It will be obvious from the forgoing that rods 36 may be adjusted vertically to lengthen or shorten the chain 37, to vary the normal vertical position of the arms 35 and thereby limit downward adjustment of the supporting frame.

Next escribing the swee ing mechanism and referring more specifically to strumup tured to have a sllding ht about the guides 34 a plurality of brushes l5 rnouu ted upon 1p, which latter are provided at each end with a pair of trunhions .Said trurrcions are mounted iii arms 16 which slotted to m receire bolts .l projecting from the disks 14. The bases of said brushes somewhat shorter than the distance between the disks 14 so that, when the brushes occupy the adjusted position shown in 2, the disks per 1 5 unit 'thebases to be radially adjusted between the disks as far as the slots in the disk ari'ns permit. It will he ohvious that by means of the foregoing construction the severalhrushcs may he individually adjusted radially in acto he performed. The independent adjust 'ment is an iu'iportant feature in the performanceof Work Where the dust accumulation or sweepings are relatively heavy and where they have been allowed to accumrdate, such as in the case ol roads WlLIClIl are-infrequently 1 swept, in which case itis desirable to provide hrlushes which contact with the road-bed with relatively great pres die in order to loosen the dust-particles or sweepiugs and also brushes which cmltact lightly with the road-hedin order to swcep the loosened par .'.ticles which the 'tecediug brush has left behind. me us' of the improved. cori- 5 struction just described alternate hrpshes could beadjusted to effect su ch light and heavy contact with the road-hed:for the pur osejust set forth. 7 ext describing the improved sWee ings 40 or dust-receptacles, the air discharge More for and the casing in wl'lieh the brush 0 erates, the same consists as follows: The oust receptacle comprises a front wall 21, a rear Wall 18, side alls 46 and a'hottoui. Wall 47.

Oiue, side Wall is provided with an opening closed a door 23 and the: bottom wall is provider witlil a dump slide 22, either of which may he 'operatedwby any suitable means to remove the sweepings. The said 50 receptacle extends preferably throughout the Widthloi the frame 29 and is rigidly secured thereto so that when said frame is adjusted,

like adjustment of the receptacle is eliected. The receptacle aid" located adjacent the 5 5 sweeper and the wall 18 is curved so that the sereral brushes have Wiping contact there with as clearly shown in Fig. 1. The wall 18 extends downwardly SOILTIBW-hat below the receptacle hutfuo we isul'lloient length to come in contact with the road-bed. In. order to form. a continuation ofthe Wall 18 adapted ltocome in close contact with the road hed and to pr'oyrc a continuous wiping surface for the brushes .i'roin said road-bed1%)Wardly, 6 5 I provide asweeplng plate 40 whic is prelthe opening 19' whereupon the brush cordance with the character of the Work- 7 to clean each of the brushes. .1. t a I curved portion of. the Wall it will quiclil;

and which have not been released. by merit of the brush "with the upper will "which are IlOt (.lelivcred to. the recep acle o to entirely prevent 'erahly pirotally mounted. in order to redder the plate ll} noiseless d uriug the opera-- tion of the sweeper the same prr-vle alily constmcted of a central strip of lwail .1 or like material. adapted. to he at ted in. a luctallic casing of U-shaped crom'ocr 'iou. sl'ilowu'tl'ie Wall 18 is pre'wided with i 'l. open-- lug l9 througl' which the swcepiiigs lfll'tj/dl lil delivered to the receptacle.

From the for ring and hy reference to Fig. 1 it will he l t the brush -,s ll" gage the road-hed with a wiping ooutact have likeengagement With plate Wall 18, thereby carrying the sweepiugs up 0 |ddenly releaselil and, PJLOjGGlJlIlg through 1 opening; 19, throws or delivers the swccpirugs thcrethrough.irlto the lfifll'jtittlle, the l. release and the engagement oil thbrush with the up per wall of the opening.

A. ll.

slightly above the op 7 11g 19 the wall abruptly. bent and extc; .l. "'ertically said heat portion a suitable distance will be Ol'JVlOuS that as the brush leave assume a normal position thereby serving to further release or throw 01d any clogs or otluir matter which the brushes may l1 ave col looted eugagm v [of he opening 19. The Wall 18 therefore not only serves as a wiping surface for the brush Tout by means of the upper Wall. of the op 1'9 and. the ahruptlylheut portlc 1 her '2 serves to clean the hrushes at eac revolution. thereof.

' In order to previieut' the fiue d .st pr from being thrown. into the airl prorilile a casing 48 'wl lich extent s from "t. vertical portion ofthe wall 18 roarwardly and dowrft- Wardly to a point adjacent the road-lied thereby substantially iuclosiug the hrusl'l ou its upper, rear and end portions.

It will he hbrdous that as the swecpiugs euter rece tacle through the opechig 19 there will to low a considerable agita' i air caused by the action. of the lulu I provideau air discharge coudui. which the receptacle delivers 1i] its upper end; said air discharge ass reaiwvardly and downwardly" 1cm tiecasing ed to a point adjacent the lower end thereof Where it delivers to a point adiaceut the road-lied. In. order topreveot the lighter dust particles from, being discharged with the air tl' augh the conduit 25 l provideicramiuati; Walls 24: iii the upper part ofthe receptacle. I

It will he understood that the Walls 24 can not practically be made with sullicieutly line the escape ct all 0'' the'dust particles but .id opeuiugs are made line enou 'h to prevent the escape of most of the rust particle's. "When the sweeper is operating upon a road bed which .is in a very dry condition a oomparatlvely large amount of dust particles will escape through the wall 24 but when the sweeper is I ladened air esca ing from the receptacle at it point adjacent t e streets surface and brush and within the inclosure formed by the 0111'- tain 45 so as to prevent clouds of dust filling the air as the result of the sweeping operation. However this last pointof discharge retards the egress of'air throu h the conduit 25 tosome extent and there ore when the sweeper is operating upon a dampened road bed where comparatively none of the dust particles escape through the walls 24 I wish to avoid retarding egress of the air and to this end I provide an outlet for the conduit 25 at a point above the bottomthereof in the form of an o'pening27 adapted to be closed by a valve 26hinged at 28. I preferably use material of different mesh for said walls, the first wall being of a relatively open mesh and the second having a somewhat finer mesh.

Thesaid valve 26 preferably opens inwardly and thereby serves to shut off flthe discharge 25 when it is desired to have the air pass out wardly through the o'pening 27, the door re- I maining in its openosition' by gravity. When it is desired to c ose= door suitable catches may be provided.

The opening 27 and the valve or shutter 26 comprise, in. the preferred construction means for discharging the gdust laden air from the casing at a point above the'street,

surface. To perform this function the shutter 26 is turned backwardly to close the discharge conduit 25 and open the outlet 27.

"In order to discharge ata point adjacent the street surface the shutter 26 is thrown in a' I position to close the opening 27 in which 0- extends forwardly to a} point adjacent the plate 40 and which is adapted to come in contact with the road-bed or surface to be swe t and together with the late 40 en tire y incloses the brushes at pomts adjacent the road-bed and below the casin thereby preventing sweepings from being ischarged rearwardly and forwardly from beneath the sariie. In order to render the curtain more effective and to insure un form engagement the road-bed I providethesamewith wei hts whih maybe of any desirable form. 'v hen the sweeper is used upon roads wherein the sweepings are in a firm and compact condition and it is desired to loosen the same prior to contact therewith 'of the brushes l5, I-prov'ide a scra er 41 which is held in contact witlrthe roa bed by a weight 42 or The said through accident the means for supporting the frame 29 should give Way I rovide rollers 38secured in blocks 39 and aapt edto engage the road-bed to 'prevent j ry 1 0 the other parts of the sweeping mechanism.

The "Sweeper is driven from the rear axle" 1 in the following manner. Sprocket wheels 12 are mounted on the outer ends of the shaft 10 in alinernent with v sprocket wheels 8, chains 9, being trained about said wheels. The wheels 8-, are mounted upon a shaft 3 which carries a'loosely mounted gear pinion 4 provided with a clutch member 4. A clutch member 5' is provided which is nonrotatably mounted on the shaft 3 and adapted to, be thrown into and outof engagement with-the clutch member 4* by any suitable means. -As zherein shown the clutch niem her 5 is controlled bymeans of rodeo and 7, Fig. -2, from the forward end ofthe vehicle. The pinion 4 meshes with the pinion 2 which is rigidly secured to' the axle 1. When it is desired to rotate the brushes the clutch5 is thrown into en agement with the clutch member4 there y driving the shaft 3 and brush.

Having now described the nature of the invention what I desire to secure by Letters Iatent and claim is 2 -1. A street sweeper comprising in combi nation, a carriage having a rear axle, a frame pivotally mounted thereon, means for raismgand lowering the forward end of said frame, curved guides for said forward end whose center of curvature coincides with the rear axle, said guides comprising channel through the chains 9 the brush shaft 10 and irons, said frame having lifting arms project ing into said channel guides and supportingarms embracing said channel guides, a brush rotatably mounted on said frame and adapt.- ed to be lowered into and raised out of engagement with the street surface, gearing mounted on said frame and driven by said rear axle to operate the brush in a direction opposite tothe wheels of the vehicle, and a receiver on said frame located in delivering proximity to said brush.

2. In a street sweeper,,the combination of dust receptacle in deliverti .reto, an air i'lischarge for ,pt c .c, and perforated walls retainlarger particies oil; the discharged air, crations at i in wall. being larger than those of the adjacent wail, and a discharge conduit :ret iving the smaller dustparticles i :1 said 1." I t delivering the same to a point ad acent the s ,1 est surface and the in brush in a street sweeper, the combination of a rotating brnsi'i, a receptacle in delivering proximity the etc, a casing inclo'sing said in'nsh and extending approximately to the sweeping siu'a a sweeping plate extendto said sw 1, a Weighted curtain of flexible material r of the brush, ands discharge conduit .avnrg irorn said receptacle and extending to point within saidWi-iighted curtain.

et. in a street sweeper, thecoinbination ofbrush, a'receptacle in. delivering proximity thereto, casing incio'sing said 2 brush and extending approximately to the sweeping: surface, a sweeping plate extending to said sweeping snrfa e forward "of" they brush, a weighted curtain of ilexiblernaterial' to said surface laterally and rear 3 oi the brush, and arrair, discharge Iuit leading; ironrsaid receptacle and dc said casing and curtain at a point adjacent the latter, saidconduithawing a discharge openin at a point above the 3,5 bottom of said casing, A 1

' In a street sweeper, the gconlbination of a rotating brush, a housing therefor, a dust receptacle in delivering proximity to said brush, a discharge conduit communicating 4:1 with said. rece I'Jtacie and extendingto anoint adjacent to the street surface and inside ofsaid housing, said conduit been! n opening above the lower endt'iiereof and outside the i housing, and-a valve adapted to close either 4 5 said opening or the conduit below said openmg. i y it. In street sweeper, the combination of I r sing; suri'ace i'orwardly of the .ing to said surface laterally and rearchannels of said guides, and arms projecting from said'frarne embracing said guides, said first mentioned arms being connected with said means for raising the frame and said secfond mentioned arms being connected to staticnary parts for limiting downward move- Inent of the frame a carriage having'a rear axis, a frame pivotally mounted thereon, IIIBBJIS'fOI, raising and lowering the forwardend of said frame, a brush carried by said frame, curved guides for said forward end of the'fraine Whose centers of curvature coincide with saidrear axle, said guides being formed of channel iron, arms projecting fromsaid frame into the channelsin said guides, said arms being connected with said means for raising the frame,

and arins projecting from said frame and embracing said guides.

8; In a street sweeper, the combinations-f a carnage having a rear axle,'a frame pivotall y mounted on said axle, a brush carried by said frame, means 'or'ra'ising and lowering one end of the ,Same, curved guides for said frame Whose centers of curvature coincide frame and engaging saidguides and connected with said means, arms projecting from said frame and engaging said guides, and means connected with said lastmentioned arms for limiting movement of said frame.

i In testimony whereof I afiix mysignature in presence of two witnesses.

. i GEOBG PUM. Witnesses: f v

ANTON Bsronnnann, Amrns'ro S, Hoods-i with said. rear axle, arms projecting from said 

